S125-E-007231 (14 May 2009) --- Perched on the end of the Canadian-built remote manipulator system arm, astronaut Andrew Feustel shares work on the temporarily-captured Hubble Space Telescope with astronaut John Grunsfeld (out of frame), in the cargo bay of the Earth-orbiting Space Shuttle Atlantis. The mission specialists are performing the first of five STS-125 spacewalks and the first of three for this duo.